GeForce GT 640 and Radeon HD 4580 - video card comparison
GeForce GT 640
Radeon HD 4580
Architecture
Kepler (2012−2018)
TeraScale (2005−2013)
GPU code name
GK107
RV635
Market segment
Desktop
Desktop
Release date
June 2012
November 2011
Interface
PCIe 3.0 x16
PCIe 2.0 x16
Supplementary power connectors
None
None
Core clock speed
902 MHz
796 MHz
Floating-point performance
692.7 gflops
191.04 gflops
Manufacturing process technology
28 nm
55 nm
Number of transistors
1,270 million
378 million
Pipelines / CUDA cores
384
120
Power consumption (TDP)
65 Watt
65 Watt
Texture fill rate
28.86
6.368
Memory type
DDR3
GDDR3
Maximum RAM amount
2 GB
512 MB
Memory bus width
128 Bit
128 Bit
Memory clock speed
1782 MHz
1386 MHz
Memory bandwidth
28.51 GB/s
22.18 GB/s
Display Connectors
1x DVI, 1x HDMI, 1x DisplayPort
2x DVI, 1x S-Video
HDMI
+
-
DirectX
12 (11_0)
10.1 (10_1)
CUDA
3.0
-
OpenCL
1.2
N/A
OpenGL
4.6
3.3
Shader Model
5.1
4.1
Vulkan
1.1.126
N/A